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Fix OneDrive Storage Reduced to 100GB and Files Cannot Be Deleted
Question details
The user's institutional OneDrive storage limit was drastically reduced, placing the account over quota and preventing the deletion of existing files to free up space.
- Product
- Microsoft OneDrive
- Device & OS
- not provided
- Scenario
- An institution or business user discovers their cloud storage quota has dropped from 5 TB to 100 GB, locking the account and blocking file deletion.
- Observed behavior
- The storage capacity drops to 100 GB, the account is completely locked due to being over quota, and attempts to delete files fail because of underlying retention policies.
Verify your current Microsoft 365 subscription status and contact your institution's IT administrator to confirm if new storage allocation limits were recently deployed.
Contact Microsoft Support to Remove Retention Policies
Since file deletion is blocked by background compliance retention policies, an administrator must contact Microsoft Support to clear these policies from the server side.
When an institution's OneDrive storage is reduced and the account goes over quota, file operations are frozen. If files cannot be deleted, it is almost always because a Microsoft 365 retention policy is enforcing data preservation, locking the files in place even when you actively try to free up space.
Sign in to the Microsoft 365 admin center using your global administrator credentials.
Navigate to the Support section on the left sidebar and select 'New service request'.
Explain to the support agent that the account is over its new 100 GB quota and files cannot be deleted to free up space.
Specifically ask the Microsoft Support engineer to investigate and remove the applicable retention policy located in the Compliance Center under the Retention settings.
Avoid Relying on Temporary Storage Trials
Attempting to temporarily increase storage through a trial subscription usually fails and does not resolve the locked state of your files.
Manage Your Documents Locally with WPS Office
While waiting for your IT department or Microsoft Support to resolve your cloud storage quota issues, you can seamlessly continue managing, editing, and saving your files offline using WPS Office. It provides a lightweight, free alternative that works beautifully without relying on cloud storage.
- 1. Download and Install: Visit the official WPS Office website to download and install the free suite on your device.
- 2. Open Your Local Files: Launch WPS Office and open your existing Microsoft Office documents directly from your local storage.
- 3. Edit and Save Offline: Edit your documents without worrying about cloud sync errors and securely save them to your PC.
Frequently Asked Questions
Why did my OneDrive storage suddenly drop from 5 TB to 100 GB?
This usually occurs when an educational institution or enterprise updates its Microsoft 365 licensing plan, or when Microsoft enforces new pooled storage limits across specific academic or business tiers.
Why am I unable to delete files to free up space in my over-quota OneDrive?
If your account is over its new storage limit, basic file operations are often frozen. Furthermore, an active retention policy configured in the Microsoft 365 Compliance Center can lock data in place, preventing any deletions.
Can I fix the Microsoft 365 retention policy issue myself?
If you are an end-user, no. You must contact your organization's IT administrator. If you are an administrator, you can adjust settings in the Compliance Center, but you will often still need Microsoft Support to remove the backend policy lock.
Will moving my files to a SharePoint site solve the storage quota issue?
Typically, no. If your primary OneDrive account is locked due to quota limits and active retention policies, migrating files to a test SharePoint site will likely fail until the initial retention lock is cleared by Microsoft Support.
